our history

Incorporated as Len Schlobohm Excavating, Inc.

Gary E. Zimmerman, P.E. named as President

Gary changes name to Terra Engineering & Construction Corporation to reflect the engineering benefit offered

Gary E Zimmerman serves as president of the Wisconsin Chapter of the AGC

After working many summers and college breaks in different capacities over the years, Gary E. Zimmerman’s two sons, Gary F. and Scott join Terra full-time

Gary F. Zimmerman named Vice President – Construction and Scott A. Zimmerman named Vice President – Estimating

Gary E. Zimmerman steps down as President but remains on as chairman of the board

Cured-in-Place Piping (CIPP) manufacturing shop built on Vondron Road property begins production

Scott A. Zimmerman named Chief Executive Officer

Corporate headquarters moved to adjacent land – 2409 Vondron

Tony Arts and Donna Kopp elected to the Board of Directors

Gary F Zimmerman promoted to Chief Operations Officer, Tony Arts promoted to Executive Vice President, Donna Kopp promoted to Chief Financial Officer, Mark Rippe promoted to Director of Risk Management, and Chris Steinke promoted to Construction Operations Manager

Employee Stock Ownership Plan (ESOP) formed